Home / 21,516.70-29,686.62-13,021.96

Finding the Fourth Proportional to 21,516.70, 29,686.62 and 13,021.96

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Solution

The fourth proportional to 21,516.70, 29,686.62 and 13,021.96 is: 17,966.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,516.70 : 29,686.62 = 13,021.96 : x
  2. Step 2: Convert to fraction form
    21,516.70/29,686.62 = 13,021.96/x
  3. Step 3: Cross multiply
    21,516.70x = 29,686.62 × 13,021.96
  4. Step 4: Simplify right side
    21,516.70x = 386,577,978.18
  5. Step 5: Solve for x
    x = 386,577,978.18/21,516.70
  6. Step 6: Final answer
    x = 17,966.42

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.